JPS, I've been handloading for 40+ years and for everything from .222 to .375 H&H. There will definitely be folks opposed to what I'm going to say but it's worked for me for a long time.

Your loading manual gives a tolerance......and it must be understood that "too long" a case can actually pinch the bullet if driven to the foreward end of the chamber. The camming action of a bolt action rifle is very powerful and a bullet so wedged by the end of the case can very much cause escallated pressures. This can be a very serious problem!!! A couple of thousandths may not cause a problem but you don't know how long your chamber is.....so I say never load a case longer than the published spec.

Now for too short a case.......welllllll..... practally no problem unless we remove most of the case neck!! I always measure the case after resizing and because I hate trimming cases, I trim them a full .030 under the max length specified. By doing this, I'm not likely going to ever have to trim that case again in it's lifetime. I've done this with several varmint cartridges and have never suffered any kind of problem ever.....and I certainly have never found a loss of accuracy from cutting cases .020 less than what the manuals call for.

If you believe you need to crimp your bullets then this may be a bad decision to trim so far back but in all these years, the only place I've found crimping bullets is necessary is with very powerful handgun loads and some loads going into tubular magazines.

If you follow the manual you should be fine always, but if you've trimmed some a little too short, I'd not be afraid of them in the least. Good shooting to you!!!